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United States Patent | 5,140,195 |
Wakayama | August 18, 1992 |
A high speed electrical level converting circuit which converts an input signal into an output signal having a different potential from that of the input signal. A falling edge detector detects the falling edge of the input signal when the input signal changes from a high potential to a low potential. A short circuiting device serves to drain charge accumulated at the output terminal for a predetermined duration in response to a signal from the falling edge detector so as to allow the level converting circuit to make a transition from a high output to a low output in a very fast manner.
Inventors: | Wakayama; Yasushi (Tokyo, JP) |
Assignee: | NEC Corporation (Tokyo, JP) |
Appl. No.: | 610899 |
Filed: | November 9, 1990 |
Nov 09, 1989[JP] | 1-291466 |
Current U.S. Class: | 326/73; 326/27; 326/121; 327/544 |
Intern'l Class: | H03K 019/094 |
Field of Search: | 307/475,264,451,452,443,542,544,558,448 |
4380710 | Apr., 1983 | Cohen et al. | 307/475. |
4704547 | Nov., 1987 | Kirsch | 307/443. |
4707623 | Nov., 1987 | Bismarck | 307/475. |
4782250 | Nov., 1988 | Adams et al. | 307/475. |
4937477 | Jun., 1990 | Tsoi et al. | 307/475. |
4945264 | Jul., 1990 | Lee et al. | 307/475. |
4963771 | Oct., 1990 | Chang | 307/542. |
4996443 | Feb., 1991 | Tateno | 307/475. |
4999529 | Mar., 1991 | Morgan Jr. et al. | 307/475. |